Graphophone.



N0. 877,207. v PTENTED JAN. 21, 1903.

T. 11. MACDONALD.

GRAPHQPHONE. ArPLroAnoN FILED uma, 190e. 2 sunken? 1.

illu- PATENTED JAN. 21, 1908.

No. 877,207'.L

D. H. MACDONALD.

GRAPHOPHONE. ADPLIGATION FILED xmms. 1906.`

2 SHEETS-SHEET 2.

= Gra hophones, which invention is fully Afort inthe followingspecification.

v 'r11'oMAs'n-i/IADONALD,v or BRIDGEPORT, ooNNEcTIcUr, AssIGNon'To AMEiuoinvl 'GRAPHOPHONE commun orBruDeEroR'r, CONNECTICUT, A oonronkrioN or WEST VIRGINIA.

ino.' 877,207.;

:'ALD,v of'Bridgeport, Connectieut,"have invented a new and useful Improvement inv set . This invention relates to talking machines;

and more particularly to machines of th'is I, character in which the re reduction of sound is'obtain'ed from la 'diskaped or flat record tablet having a record groove thereon in the ,--sha e of a spiral upon the flat surface of the cylindrical record.

machines em loying :tab et,- thou h certain features of thev inven- `tion'are app cable inconnecti'on with other forms of record. j

In talking machines of. the disk type `the reproducer has heretofore been carried on the end of'a hollow swinging arm, with the stylus ofthe reproducer resting in the record groove the reproducer belng moved bodily with the arm-across the face of the record during.

the act o f reproduction, the reproduced sound waves being conveyed to a. suitable horn through the hollowr arm. Furthermore, it -has heretofore been proposed to employ in talkin machines a relay device in the form-v of a-frlc'tion roll and shoe between the stylus and diaphragm of. thereproducer, the'undulations of the recordv groove being' utilized to govern theapplication of power for irnparting vibrations to the diaphragm' of the repro- .duden .n So far as I am aware relay devices of this character have only` been applied to. c lindrical records and rovided wit means-ihr moving the repro-l` ucer in aright line past the record during 'the act of reproduction. v

` One of the main objects of the present invention is to provide means whereby a. relay device may be introduced-between the stylus -and dia hragm of the reproducer in connection wit machines employing the flat or disk form of record, 'as :distinguished from the A further object lis-to 'provide av disk nia-- chine wherein kthe reproducing diaphragm andits casing shallbe fixed in position, thus doing away with the'mechanisin heretofore i v"""ernployed vfor moving these parts with relation"'f'to'the record, andy particularly dolng. away ewith''the hollow reproducer-carrying With these objects in View the invention ism for revolving the same in combinationr i v",- Specicaticn of Letters Patent.

' iiyama@ nea Jamry'laisos. semina. 296.366.

l ,GnAPnoPrIoNn i "with a reproducing 'diaphragm remaining. in

,' the same''lplaceor location throughout the'act of repro uction, areproducing stylus in operative relation With-the record, and connections between said styluswand the dia-v hragm, a suitable' relaydevice, as a friction 4 T.Oll andshoe, being introduced into or acting 1l-upon Said Connections.

`The invention further consists in a'iixed or permanently vlocated .reproducer dia- Iphragm, 'a continuously driven friction roll,

a friction shoe bearing on said roll and connected at. its respective ends. to' the diaphragrn and to a reproducing stylus4 bearing upona Hat disk-shaped or other style of record, and means for simultaneously'revolv-` ino' said record and friction shoe.

llhe invention further consists 1n certain details of construction which will be hereinafterl moreI particularly described and then defined inthe claims.

The inventive idea involved may receive a variety of mechanical eX ressions, one of which, for the purpose of i lustrating the in`4 vention, isV `shown in the accompanying drawings, but it will be understood'that such drawings are for`he purpose of illustration 'only, and not for`the purpose of defining the limits'of the invention, reference being had to the claims for this purpose.

-v-:Referring to the drawings-Figure 1 is adetail vertical broken section,l parts being shown in elevation; Fig. 2 "is-,a broken plan view ofthe parts shownin Fig. 1, portionsof the' reproducer head belng broken away and- -the friction roll shown in horizontal section;

` Fig. 3 is a detail vertical section showing the means of connecting the stylus-bear1ng parts With the friction shoe.

Referring to the drawings, in which like numerals indicate like parts, 1- is theiisual or ,any suitable boxing or casing of a disk form of talking machine, such as lthe graphoph'one, Within which boxing or casing the power mechanism for operating lthe parts is .in- Yclosed, power being-transmitted vfrom sha-ft 2. Mounted upon the top of the-'boxing l isa suitable bracket 3 upon which is thel repro ducer-head or casing 4 secured to the bracket in any suitable way, as by screws 5. Within the reproducer-head 4 there is mounted a. dia )hragln G, preferably bctweensuitablc vgas ets 7. Secured to a shaft extending vertically through the topf' of the box isthe tablet-holding table 9, upon which placed.

f 'lhelever 35 has depending from the under i the record tablet'10. Turning in bearing 11- isa shaft 12 having keyed 5 thereto a p ley 13. The inner end of said shaft 12 has an extension shaft 14 connectedA thereto by a -ball andsocket joint 15, Fig. 2, which exten-` sion shaft 14 extends `in front of, and preferably slightly below the face of the diaphragm 6, and has bearing in a s 7 ring arm 16 swinging on a pivot pin'17 carried in a fixed bearing lug or brcket 18 rigidly secured to the bracket-piece or plate 3. Preferably the, extension shaft 14 passes .through an opening (not shown) in the bracketearm 18, and

referably also such extension shaft-14 is ormed in two parts, the outer portion beara weight 19,- and a friction roll 20 secured to'and revolvingwith the shaft. The outer end of the shaft 14 is secured tothe inner end thereof by asuitable coup 21 so that the entire shaft 14y and the coupllng 21, together with the weight 19 and the friction shoe 20 -are free to swing about Athe joint l5, j supported in the swinging-arm 16. A V tion shoe, preferably formed in two parts 22 and 23 suitablv joined toge fricu ther, is in contact with the friction roll, oneof the parts of the shoe, as 22, being pivotally connected by the link 24 to the `diaphragm 6, such connection being preferably secured by means of a button 25 having a shank 26 which extends vthrough an opening in the diaphragm, to

which shank the link 24l is pivotally connected. The other portion 23 of the friction shoe has pivotally connected thereto a link 27, and a spring 28 acts through the link 27 to hold the shoe member 23 in contact with *fthe friction roll '20; the tension of the spring arm extending outwardly, the bracket 3, in a horizont link 27 as by passing thro upon the n per surface of the bracket 30. l Depending om the sleeve 32 and on opposite sides thereof, are two ears 34'. A lever 35 of someconsiderable weicht extends out- Wardly'in a substantially lio'rizontal posiv tion above the face of the record 10 and at its innerend is provided'with forked arms' 36-36,which are secured by trunnions 37 to, the ears 34'-34 of the sleeve 32, so that the lever '35 y,is free to move in a vertical plane around the trunnions37, and also may be turned inizi-horizontal plane, the sleeve 32 turning in vthe opening 31 -in bracket`30.

' side'thereof ears or lugs 38, see Fig.'1, and the stylus bar or lever 39 is connected to said lugs so 'as to rock in a vertical plane by aV pivot pin 40, said stylus o r lever bearing I connecting joint between the link 27 and the stylus lever 39 is one which leaves the stvlus lever free to turn in a hozontirrllplane -Without affecting the link, but,v it I' impart to the link all of the movementsv Iof the stylus lever in a vertical plane. Any suitable joint may be employed for this p IS for exe ample the oose screw threa ed connection between the link 27 and a socket 27 pivoted to the stylus bar as shown in Fig. 3,1 though the connection? may be a ball and socket in-V stead of a screw-thread connection, vif de- The revolutions of the power shaft 2 are imparted to a shaft 43,"Fig. 1, by a vsuitable tram of gearing, which shaft 43, on its' inner end, carries a bevel gear 44 meshing with a corresponding Abevel gear on the shaft 8 for revolving the tablet, while the outer end of said shaft 43 carries a pulley 45, a belt 4b.lA

passing over the pulley 45 and the (pulley 13,u

thereby revolving the shaft 12 an the friction roll and weight on the extension shaft 14.

Operation: The operator grasps the outer]- i'. Y'

end of the weight lever-35, swings it so as to place the stylus 41 inV the desired position on the record, and the motor being started the record 1.0 and the friction roll 20'are simultaf neously revolved., As the record is revolved the stylus is carried across the faceof the record bythe action of the spiral groove,

ft-hereby c arryingwith it the Weight lever 35 and the stylus bar or lever 39, both of which are turned in a horizontal plane around the -joint made by the sleeve 32 and the bracket 30 for turning'link 27. .During thef'revolutions of the recordthe ndulations ofthe lat- .ter (which, as here shown, are vertical unduvlations) impart up and down lmovements to the stylus end, of the stylus lever 39, which vibrations are imparted to the link 27, which thereby acts to increase1 and decrease the friction of the friction shoe u onthefriction roll in proportion to the amplitude of the vibrations, the' friction roll thereby imparting to the diaphragmy 6 corresponding vibrations but of magnified or increased am litude. During this' action shaft 14With the inklS, lis free-to'swing on pivot 17, thereby avoiding any undue. strain f upon the diaphra 1n through any excess of friction that ht occur, the shaft 14 turningl ontheuniversalv joint 15 to permit this swinging movement.. The action 'of the friction roll` and shoe With its swinging bearing and the weight attached theretois',substantially- -that occurring in" talking machines above referred to employ- I ingthe relav mechanism in 4cylindrical tablets.

,connectionvwrith Aevaso? 'i i scribed lnvention is to provide a sound reproducing machine of the disk type with the .relay feature consisting of the friction -rolland shoe, there are certain features of the inyvention that are applicable to other forms of machinesthan the disk machine, and whenever in the accompanying claims the construction is notspeciiically limited to disk- 'machines it is t'o be understood thatv other 1o yforms o'f record than the disk form are also in contemplation.

What is claimed isz-f 1. In a sound reproducing machine, the combination of a revolving record, a station- 1'5 ary' diaphragn'i, a stylus mounted to turn on a. universal joint independent of said diav phragin, connections between said stylus andy diaphragm, a friction device actingon'said connections, and means :simultaneously ac- 2o tuating said record and friction device.

, 2. In a soundreproducing machine, the

combination-of a record, with a'diaphragm,

a stylus mounted to move'freely across said record independent of the diaphragm, connections between said stylus and diaphragm,

a' friction device acting on said connections,

'and means simultaneously; actuating said record and friction device.

3. In a sound reproducing machine,- the 3o combination of a sound record, with a dia-v pliragin, a stylus mounted to move across the face of the record independent of the diaphragm, a friction roll, connections between said stylusand diaphragm, one part of said 3'5' connections constituting a friction shoe engaging said. roll, -and means simultaneously actuating said recordand roll.

.4.' In a sound reproducing machine, the combination of a disk-shaped sound record, Lic'with astationary dia hragm, an universally `niounted stylus, a friction roll, connections between said stylus and 'diaphragm and hav- 'inggfrictional engagement with said roll, and means simultaneously actuating saidl record and roll. l

5j. In a-sound reproducing machine, the coi'nbiijiation of a disk-shaped so'und record,

with a stationary diaphragm, a stylus mountedf-to i'nove parallel with the face of said recsof'oid and also ,at right angles thereto, a 'friction roll, connections between said stylus and diaphragm and having frictional bearing onfsaid roll, and means.simultaneously actu.- ating said record and roll.

61j In a' sound reproducing. machine, the

feon-i'bination of "a disk-shaped sound record,

'with a stylus mounted to swing freely across thcejface of the record and follow the record groove, a stationary diaphragm, a connection between said stylus' and diaphragm', a friction device acting on said connections,

and means simultaneou sly revolving said rec- -ord and friction device.

- l' 7. In a sound reproducing machine, 65 combination of a stationary `diaphragm casing or support, a dia Iin, a fiat ordisk-s aped sound record, a stylus mounted'to swing across said record connections between said stylus and phragm,`an intermediate friction device. actingy on said connections, and means' simultaneouslyrevolvin'g said recordv and friction device. 1

'8. In a souiidireproducing'machina 4the combination of va stationary diaphra in casing .or support, a diaphragm mouiite therein, a flat o'r disk-shaped sound recor an 'universally mountedstylus in contact with 4said record, co'nnectionsbetween said stylus and diaphragni, an intermediate friction de vioeacting on said connections, vandnieani-i simultaneously revolving said record andfriction-device.

- L9." In a sound reproducing machine, the combination of a stationary Adiaphragm cas-l ing ory support, a.v diaphragm mounted therein, a flat or disk-s stylus mounted to move across said record,

hra'gm mounted therei aped sound record, a

connections between, said stylus yand diaphragm, a friction shoe constituting part of said connections, a friction -roll in contact -withsaid shoe, andl means simultaneously revolving said record and roll.`-

1 0. In a sound reproducing machine, the combination of a stationary diaphragmsupport, a diaphragm mounted therein; a fiat or disk-sha ed sound record revoluble in a horizontal pane, a lever'mount'ed totwing-inpi plane above said record, a stylusbar' crumed on said lever and carrying a stylus in ing said record and friction device.

1i. In a sound reproducing machine, the

'10o contact with said record, connections be.

tween said lever and diaphragm, an intercombination of a record, a stationary 4diaphragin, a' stylus-bar or lever, a'friction roll a friction shoe bearing o n said vroll, a link connecting one end of 'said shoe'- to the-'diaphragm, and alink connecting the other end of'said shoe and the stylus-bar or lever, the

ojoint between said link and said bar 'orlever leaving the 1evei.free to turn in -a direction parallel to the record tablet independent of the link but imparting to the link al1 movements of the lever normal to the record.

12. 4In a sound reproducing machine, the.

combination ofa disk-'sha ed record, a sta- 1 tionary diaphragm, a weig it-lever mounted on a universal `ioint, a stylus-bar fulcrumed ,on said weight-lever," a stylus carried by said stylus-bar, connections extending from the` stylus-bar to. said diaphragm, -a friction shoe interposed insaid connections, a friction roll in contact withsaid slice, a swinging shaft on Whichsaid roll isv mounted, 'and means simultaneouslyrevolving said roll-shaft Aand record.

13.` In a sound reproducing machine, the

llim

said Weight.

y 15. In a sound reproducing machine, thev l(eijgnliination of a sound record, a diaphragm,

`mi)vement,. a reproducingst vlus mounted 1th free movement so las to ollow the recrd., connections between, said stylus and the diaphragm, said connections being in frictional engagement vvithgsaid friction device,

- and means revolving said record and friction device. y

14.,.In a soundreproducing machine, the

; combinationof a'svund record and means for revolving the same, a diaphragm, arejvolving frlction device restrained'from longitufdinal movement, a Weight mounted to svving in a substantially horizontal' 4plane above the record, a stylusbar carried byfsaid weight and having a stylus engaging the' record, and

y, connections between said bar .and saidv dia-' u phragm, which connections'ngage said frie pass through the axis of tion device.y and also vcombination?of asound'reco'rd, with a diaatl phragm, a friction rollmounted to swing to and' from the diaphragm but restrained from iflongitudinal movement,a reproducing stylus for revolving the same, with a stationary dia- 'A Aengaging the record, connections from said s 'us to the diaphragm" in rictional engagefinent with said frictionroll, and means re- 30,-.

lf.0. lvi'Iig' said record andfroll.

n 46.011; a sound reproducing machine, the comblnation'of a sound record and means friction devicevrestrainedfrom longltudinal hragm, a revolving friction roll restrained From longitudinal movement, a weight pivvoted to the framework ofthe machine so as` to be capable of movement parallel with the record surface and'also tof and from .the sur face, a stylus bar carried by said Weight having a stylus engaging the record, and connections betweensaid stylus bar and said diaphragm, which connections pass thro the axis of the horizontal movement'ofsald Weight, and make rictional contact" with said friction roll.

17. In a sound reproducing machine, the- .combinatlon-of a sound record and/means wah' forrevolving the Same, al stationary dia- `p'hragm, a revolving friction device mounted 'to swing to and' fronr'said diaphragmbut restrainedfroni longitudinal' movement; a stationary bracket,- al sleeve hung `t0 turn'in a bearing in said bracket," a Weight "pivoted to said sleeve., a stylus "bar fulcrumed on ing Witnesses. g

THOMAS H. MACDONALD@ Witnesses: j A. B. KEoLjGH, y f

C. A. GIBNE'R. 

